APPARATUS FOR AIRFLOW CONTROL AT THE GLASS FORMING IN A MOULD

摘要

Apparatus for airflow control at the glass forming in a mould, comprising a multi way valve, in which body a piston valve is placed. Behind the valve an ejector is arranged. The piston valve is provided with a central hole and in the body of the valve the piston valve is placed slidingly in the direction of the longitudinal axis of the valve. In one extreme position the piston valve fits closely to the sealing seat, and sealing part of the sealing seat covers the central hole of the piston valve. On the external edge of the sealing seat at least one passage hole is arranged. In the opposite extreme position the piston valve by its central hole connects to the interconnecting channel and at the same time the piston valve covers an input of the pressure medium in the body of the valve. Behind the sealing seat in the body of the valve a reducing channel is created, to which the ejector is connected.